Outer surface of a grill



FIG. 1 is an left front elevated perspective view of an outer surface of a grill, showing our new design, the broken line showing of the vehicle being for illustrative purposes only, and forms no part of the claimed design.

FIG. 2 is a left front enlarged and elevated perspective view of the outer surface of a grill design of FIG. 1.

FIG. 3 is a plan view of the outer surface of a grill design of FIG. 1.

FIG. 4 is a front view of the outer surface of a grill design of FIG. 1.

FIG. 5 is a left side view of the outer surface of a grill design of FIG. 1; and,

FIG. 6 is a right side view of the outer surface of a grill design of FIG. 1. 

The ornamental design for an outer surface of a grill, as shown and described. 